Trying to find a villainous(?) manga

[Borland666]

This has been killing me tonight, trying to find this manga where in the first few chapters the main character at a party is framed for stealing another girl's hairband by some villainous trying to steal her fiance. But then the tables get turned around a bit when, unbeknownst to the party's attendees, she's possessed by the spirit of a woman who had been executed in the past who reveals the whole plot and proceeds to force her fiance to get the marriage called off anyway.

 

[foxgaman]

@Borland666
https://mangadex.org/title/42822/the-holy-grail-of-eris

Constance, the daughter to a Viscount whose only value is her honesty, and Scarlet Castiel, the most reviled villainess of the era who was sentenced to death ten years ago.
When the two people who were never supposed to meet encountered one another at a night party, the story that should have ended with Scarlet's death began anew.

Although their relationship only began out of mutual interest, they soon became true partners in an effort to unravel the mysteries of a grand conspiracy borne out of the past, that still has a vicious grip on the present.